<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper" >
            <div class="button">北京</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper"
          v-for="item of hot"
           :key="item.id"
           >
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area" v-for="(item,key) of cities" :key="key"
      :ref="key"
      >
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div class="item border-bottom"
          v-for="innerItem of item"
          :key="innerItem.id"
          >{{innerItem.name}}</div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  }
}
</script>

<style lang="stylus" scoped>
@import '~styles/varibles.styl';

.border-topbottom {
  &:before {
    border-color: #ccc;
  }

  &:after {
    border-color: #ccc;
  }
}

.border-bottom {
  &:before {
    border-color: #ccc;
  }
}

.list {
  overflow: hidden;
  position: absolute;
  top: 79px;
  left: 0;
  right: 0;
  bottom: 0;

  .title {
    line-height: 27px;
    background: #eee;
    padding-left: 10px;
    color: #666;
    font-size: 13px;
  }

  .button-list {
    overflow: hidden;
    padding: 5px 30px 5px 5px;

    .button-wrapper {
      float: left;
      width: 33.33%;

      .button {
        margin: 5px;
        padding: 5px 0;
        text-align: center;
        border: 1px solid #ccc;
        border-radius: 3px;
      }
    }
  }

  .item {
    line-height: 38px;
    padding-left: 10px;
  }
}
</style>
